at the braz enness with which governor romney walked away from so many of the positions on which he's run. >> reporter: with just nine days until the two men debate again, this time in hempstead, new york, both campaigns are hoping solid performances will woo voters and donors alike. but while the romney campaign deals with heightened expectation, obama advisors are still not saying what, if anything, the president will do differently this time around. >> i think you can assume that he's reviewed the tape. and it will inform-- it will inform how he handles these subsequent debates. >> reporter: the president heads to san francisco tomorrow for more fund-raisers while governor romney is headed to virginia military institute for what his campaign is billing as a major foreign policy address, jeff. >> jeff: nancy cordes, thank you. we are four days away from the one and only vice presidential debate. and the pressures on both candidates. joe biden to lift democrats after a rough week. paul ryan to build on mitt romney's momentum. senior white house correspondent bill plante has more on that.